Reply To: VTK Repeat Write
It is very unlikely that this is related to your computer configuration and the functor setup you listed. The duplicated files on the other hand are almost certainly caused by your specific changes / the way you (wrongly) call the non-MPI OpenLB application. This is not a bug in OpenLB.
You are also using the deprecated legacy particle code (see the user guide for the current approach).
In any case, the core OpenLB developer team can not offer this detailed level of support in this forum (we are answering questions here alongside our actual research and development work), especially considering that you do not share your work.
If you want this kind of personal support you should consider attending our spring school or finding some other way for both of us to get something out of this process (I know we suggested this to you before but your level of questions is again getting out of hand, sorry).